CN115287933A - Drying system and method of paper machine - Google Patents
Drying system and method of paper machine Download PDFInfo
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- CN115287933A CN115287933A CN202211230276.XA CN202211230276A CN115287933A CN 115287933 A CN115287933 A CN 115287933A CN 202211230276 A CN202211230276 A CN 202211230276A CN 115287933 A CN115287933 A CN 115287933A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/18—Drying webs by hot air
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Abstract
The invention provides a drying system and a drying method of a paper machine, which comprise a paper laying mechanism for laying wet paper, a lower drying system for drying the bottom surface of the paper and an upper drying system for drying the top surface of the paper, wherein the paper laying mechanism is arranged between the lower drying system and the upper drying system, and the lower drying system is connected with the upper drying system and is connected with an electric push rod; the paper laying mechanism is arranged on two middle rails which are parallel to each other, the lower drying systems are arranged on two lower rails which are parallel to each other, the upper drying systems are arranged on two upper rails which are parallel to each other, and a plurality of lifting cylinders are arranged below the upper rails. The drying system and the drying method of the paper machine provided by the invention can increase the drying quality of paper, and dry the wet paper by adopting a cold-hot alternation method, thereby reducing the influence of the past steam on the paper, obtaining uniform drying quality and avoiding the quality problems of paper such as wrinkles and the like.
Description
Technical Field
The invention belongs to the technical field of drying, and particularly relates to a drying system and a drying method of a paper machine.
Background
The paper making is an important invention of ancient Chinese workers, and is divided into a mechanism and a manual mode, wherein the mechanism is continuously carried out on a paper machine, paper pulp suitable for the quality of paper is diluted to a certain concentration by water, the paper pulp is preliminarily dehydrated in a net part of the paper machine to form wet paper sheets, the wet paper sheets are pressed and dehydrated and then dried to form the paper, the paper drying is also one of important links in the processing of the paper making, and the quality of the dried paper directly influences the quality of the paper.
The drying device of traditional paper machine utilizes dry hot-blast roller of hot-blast heating, and the moisture on the rethread hot-blast roller makes the paper becomes steam, then takes out through the air extractor, and this kind of method needs the high-power and incessant work of air extractor, causes the damage of air extractor very easily to influence the efficiency of production, and the steam that is located the stoving bottom of the case portion is difficult for taking out, can be absorbed by the paper after the drying, influences the drying efficiency and the surface quality of paper.
Therefore, the scheme provides a new paper drying mode, reduces the influence of steam on paper, also expects to obtain even drying quality, and avoids the phenomenon of paper wrinkling.
Disclosure of Invention
The invention aims to provide a drying system and a drying method of a paper machine, which solve the technical problem of how to increase the drying quality of paper, creatively adopt a cold-hot alternating method to dry wet paper, reduce the influence of the past steam on the paper, obtain uniform drying quality and avoid the quality problems of paper such as wrinkles and the like.
A drying system of a paper machine comprises a paper laying mechanism for laying wet paper, a lower drying system for drying the bottom surface of the paper and an upper drying system for drying the top surface of the paper, wherein the paper laying mechanism is arranged between the lower drying system and the upper drying system, and the lower drying system is connected with the upper drying system and is connected with an electric push rod, so that a refrigerating area and a heating area are alternately arranged above and below a certain position in the wet paper respectively;
the paper laying mechanism is movably arranged on two middle rails which are parallel to each other, a plurality of supporting legs are arranged below the middle rails, the lower drying systems are movably arranged on two lower rails which are parallel to each other, the upper drying systems are movably arranged on two upper rails which are parallel to each other, and a plurality of lifting cylinders are arranged below the upper rails;
the paper storage mechanism is arranged below the electric push rod.
The paper laying mechanism comprises a paper machine and a supporting plate, the paper machine is movably arranged on the two middle rails, the supporting plate is arranged between the two middle rails, the supporting plate is U-shaped, the opening of the supporting plate faces downwards, the two sides of the supporting plate are respectively connected with the inner sides of the two middle rails, a middle power wheel is arranged at the bottom end of the paper machine, and the middle power wheel is arranged on the middle rails.
The lower drying system comprises a lower box body assembly, a lower fixing rod arranged below the lower box body assembly and a lower power wheel arranged below the lower fixing rod, the lower power wheel is arranged in the lower track, and the upper end face of the lower box body assembly is in contact with the inner bottom face of the supporting plate;
and the lower box body assembly is connected with an industrial water cooler and an industrial hot water tank.
The lower box body assembly comprises a plurality of lower box bodies arranged in a linear array, lower pipelines penetrating through the lower box bodies, and any two adjacent lower box bodies, wherein one lower box body is connected with the industrial water chiller through the lower pipelines, and the other lower box body is connected with the industrial hot water tank through the lower pipelines.
The upper drying system comprises an upper box body assembly, an upper fixing rod arranged above the upper box body assembly and an upper power wheel arranged on the side part of the upper box body assembly, the upper power wheel is arranged in the upper rail, the lower end surface of the upper box body assembly is in contact with the inner bottom surface of a pressure plate, the pressure plate is U-shaped and has an upward opening, and two sides of the pressure plate are respectively connected with the inner sides of the two upper rails;
the upper box body assembly is connected with an industrial water cooler and an industrial hot water tank.
The upper box body assembly comprises a plurality of upper box bodies arranged in a linear array and upper pipelines penetrating through the upper box bodies, wherein in any two adjacent upper box bodies, one upper box body is connected with the industrial water chiller through the upper pipeline, and the other upper box body is connected with the industrial hot water tank through the upper pipeline.
The end parts of the two upper fixing rods are connected through fixing blocks, the fixing blocks are connected with the end parts of the two lower fixing rods through fixing vertical rods, the fixing blocks are connected with electric push rods, and the electric push rods are arranged at the end parts of the upper rails;
the end parts of the two upper tracks are connected through a positioning rod, and the electric push rod is arranged on the positioning rod.
The paper storage mechanism comprises a rotary roller and supporting seats, wherein the rotary roller is horizontally arranged, the supporting seats are respectively arranged at two ends of the rotary roller, a driving shaft is arranged on the supporting seats, two ends of the rotary roller are respectively connected with the driving shaft in a detachable mode through bolts, and the driving shaft is connected with a motor.
The upper end face of the supporting plate is provided with a plurality of first through holes in an array mode, and the upper end face of the supporting plate is covered with a first water absorption film;
the lower end face of the pressure plate is provided with a plurality of second through holes in an array mode, and the lower end face of the pressure plate is covered with a second water absorption film.
A drying method of a paper machine specifically comprises the following steps:
step S1: spreading paper with certain humidity;
step S2: an evaporation area with alternate cold and hot is arranged on the upper end surface of the paper;
and step S3: an evaporation area with alternate cold and hot is arranged on the lower end surface of the paper;
and step S4: the two evaporation areas on the upper end surface and the lower end surface of the paper are close to each other, so that the upper end and the lower end of a certain position in the paper are different cold and hot areas;
step S5: the upper and lower evaporation areas of the paper are moved in parallel, so that the cold and hot states of the upper and lower ends of the paper at a certain position are reversely arranged.
Step S6: after a certain time, the upper and lower evaporation areas of the paper are reset, so that the cold and hot states of the upper and lower ends of a certain position of the paper in the step S5 are reversely set again.
Step S7: the above steps are repeated for a plurality of times, so that the wet paper can be dried with high quality.
The invention achieves the following remarkable effects:
(1) In this scheme, be provided with cold and hot alternating region in the upper and lower below of wet paper, realized following several technological effects simultaneously:
firstly, the temperatures of the upper part and the lower part of a certain position of the wet paper, which correspond to the different temperatures, are respectively a refrigerating area and a heating area, when the surface of the wet paper contacting with the hot area has faster water evaporation, the water evaporation of the surface of the wet paper contacting with the cold area is slower, and the water can gradually move to the hot area, so that the adverse effects of folds and the like caused by the evaporation of a large amount of water on the paper are avoided, the quality of the paper is ensured, and the drying efficiency is also ensured;
secondly, the upper part and the lower part of a certain position of the wet paper are alternately cooled and heated, the paper originally contacts one surface of the cold area and begins to contact the hot area, and the paper originally contacts one surface of the hot area and begins to contact the cold area, so that the side of the paper which is slowly evaporated begins to be quickly evaporated and dried, and the side of the paper which is quickly evaporated begins to slow down the evaporation after contacting the cold area, thereby avoiding the wrinkle defect of the area of the paper which is quickly evaporated, and realizing the cooling-heating alternation and the drying balance of the upper end surface and the lower end surface of the paper;
finally, the drying speed of the paper is ensured, the problem that the paper is wrinkled due to too fast evaporation in the past is avoided, and the drying efficiency of the paper is also ensured;
(2) The pressure plate is arranged in the scheme, so that the wet paper is pressed on the supporting plate, the damage effect on the paper due to water evaporation is avoided, the technical effect of assisting in supporting the upper drying system is achieved, the water absorption film is arranged on the bottom surface of the pressure plate, the effect of protecting the paper is achieved, and the indentation of the paper by the through hole II is avoided;
(3) The supporting plate is arranged in the scheme, two effects are achieved, firstly, the wet paper is laid on the supporting plate in a pressing mode, the supporting effect is achieved, secondly, the water absorption film is arranged on the top face of the supporting plate, the phenomenon that the through hole I generates an indentation on the paper is avoided, and the paper protection effect is achieved.
Drawings
Fig. 1 is a perspective view of a drying system in an embodiment of the present invention.
Fig. 2 is a front view of a drying system in an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a paper laying mechanism in an embodiment of the invention.
Fig. 4 is a schematic view of a connection structure of the paper laying mechanism and the lower drying structure in the embodiment of the present invention.
Fig. 5 is a schematic structural view of a lower drying structure in an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of an upper drying structure in an embodiment of the present invention.
Fig. 7 is a schematic view illustrating a coupling structure of an upper drying structure and a lower drying structure in an embodiment of the present invention.
Wherein the reference numerals are: 1. an industrial water chiller; 2. a lower rail; 3. a middle rail; 31. supporting legs; 32. a paper machine; 33. a medium power wheel; 4. an upper rail; 5. a lifting cylinder; 6. a lower box body; 61. a lower fixing rod; 62. a lower power wheel; 63. a lower pipeline; 7. a support plate; 8. a pressure plate; 9. an upper box body; 91. an upper pipeline; 92. an upper power wheel; 10. an upper fixing rod; 11. an industrial hot water tank; 12. a fixed block; 121. fixing the vertical rod; 13. an electric push rod; 14. rotating the roller; 15. a motor; 16. a supporting seat; 17. a paper laying mechanism; 18. a lower drying system; 19. an upper drying system; 20. a lower case assembly; 21. an upper case assembly; 22. a paper storage mechanism.
Detailed Description
In order to make the technical features of the present solution clearer, the present solution is explained by the following embodiments.
A drying system of a paper machine comprises a paper laying mechanism 17 for laying wet paper, a lower drying system 18 for drying the bottom surface of the paper and an upper drying system 19 for drying the top surface of the paper, wherein the paper laying mechanism 17 is arranged between the lower drying system 18 and the upper drying system 19, the lower drying system 18 is connected with the upper drying system 19 and is connected with an electric push rod 13, so that a refrigerating area and a heating area are alternately arranged above and below a certain position in the wet paper respectively;
the paper laying mechanism 17 is movably arranged on two parallel middle rails 3, a plurality of supporting legs 31 are arranged below the middle rails 3, the lower drying systems 18 are movably arranged on two parallel lower rails 2, the upper drying systems 19 are movably arranged on two parallel upper rails 4, and a plurality of lifting cylinders 5 are arranged below the upper rails 4;
and a paper storage mechanism 22 arranged below the electric push rod 13.
The paper laying mechanism 17 comprises a paper machine 32 movably arranged on the two middle rails 3, and a support plate 7 arranged between the two middle rails 3, wherein the support plate 7 is U-shaped and is opened downwards, two sides of the support plate 7 are respectively connected with the inner sides of the two middle rails 3, a middle power wheel 33 is arranged at the bottom end of the paper machine 32, and the middle power wheel 33 is arranged on the middle rails 3.
The lower drying system 18 comprises a lower box body assembly 20, a lower fixing rod 61 arranged below the lower box body assembly 20 and a lower power wheel 62 arranged below the lower fixing rod 61, wherein the lower power wheel 62 is arranged in the lower rail 2, and the upper end surface of the lower box body assembly 20 is in contact with the inner bottom surface of the supporting plate 7;
the lower box body assembly 20 is connected with the industrial water chiller 1 and the industrial hot water tank 11.
The lower box body assembly 20 comprises a plurality of lower box bodies 6 arranged in a linear array, lower pipelines 63 penetrating through the lower box bodies 6, and any two adjacent lower box bodies 6, wherein one lower box body 6 is connected with the industrial water chiller 1 through the lower pipeline 63, and the other lower box body 6 is connected with the industrial hot water tank 11 through the lower pipeline 63.
Wherein the lower duct 63 includes a first inlet end and a first outlet end, facilitating the formation of a circulation system.
The upper drying system 19 comprises an upper box body assembly 21, an upper fixing rod 10 arranged above the upper box body assembly 21 and an upper power wheel 92 arranged on the side part of the upper box body assembly 21, wherein the upper power wheel 92 is arranged in the upper rail 4, the lower end face of the upper box body assembly 21 is in contact with the inner bottom face of the pressure plate 8, the pressure plate 8 is U-shaped, the opening of the pressure plate 8 faces upwards, and two sides of the pressure plate 8 are respectively connected with the inner sides of the two upper rails 4;
the upper box body component 21 is connected with the industrial water chiller 1 and the industrial hot water tank 11.
The upper box body assembly 21 comprises a plurality of upper box bodies 9 arranged in a linear array, an upper pipeline 91 penetrating through the upper box bodies 9, and one upper box body 9 of any two adjacent upper box bodies 9 is connected with the industrial water cooler 1 through the upper pipeline 91, and the other upper box body 9 is connected with the industrial hot water tank 11 through the upper pipeline 91.
Wherein, the upper pipe 91 comprises a second inlet end and a second outlet end, which is convenient for forming a circulating system.
The end parts of the two upper fixing rods 10 are connected through fixing blocks 12, the fixing blocks 12 are connected with the end parts of the two lower fixing rods 61 through fixing vertical rods 121, the fixing blocks 12 are connected with electric push rods 13, and the electric push rods 13 are arranged at the end parts of the upper rails 4;
the end portions of the two upper rails 4 are connected by a positioning rod on which an electric push rod 13 is provided.
The paper accommodating mechanism 22 comprises a horizontally arranged rotary roller 14 and supporting seats 16 respectively arranged at two ends of the rotary roller 14, a driving shaft is arranged on the supporting seats 16, two ends of the rotary roller 14 are respectively detachably connected with the driving shaft through bolts, and the driving shaft is connected with a motor 15.
A plurality of first through holes are formed in the upper end face array of the supporting plate 7, and a first water absorption film covers the upper end face of the supporting plate 7;
the lower end face of the pressure plate 8 is provided with a plurality of second through holes in an array mode, and the lower end face of the pressure plate 8 is covered with a second water absorption film.
For the sake of design simplification, the drawings in the specification of the present scheme do not indicate the first through hole and the second through hole, wherein the first through hole and the second through hole have any shapes and essentially play a role in ventilation.
A drying method of a paper machine specifically comprises the following steps:
step S1: spreading paper with certain humidity;
step S2: an evaporation area with alternate cold and hot is arranged on the upper end surface of the paper;
and step S3: an evaporation area with alternate cold and hot is arranged on the lower end surface of the paper;
and step S4: the two evaporation areas on the upper end surface and the lower end surface of the paper are close to each other, so that the upper end and the lower end of a certain position in the paper are different cold and hot areas;
step S5: the upper and lower evaporation areas of the paper are moved in parallel, so that the cold and hot states of the upper and lower ends of the paper at a certain position are reversely arranged.
Step S6: after a certain time, the upper and lower evaporation areas of the paper are reset, so that the cold and hot states of the upper and lower ends of a certain position of the paper in the step S5 are reversely set again.
Step S7: the above-mentioned operation is repeated several times, so that the wet paper can be dried with high quality.
The specific working process of the invention is as follows:
the device is produced and assembled according to the above description in the present solution. The wet paper is laid on the supporting plate 7 by using the paper machine 32, the bottom end of the paper machine 32 is provided with a middle power wheel 33 which can slide on the middle rail 3, and after the wet paper is laid on the supporting plate 7, the paper machine 32 is moved to one end of the middle rail 3;
then, the lifting cylinder 5 is started to make the upper rail 4 do descending movement, so as to drive the upper box body assembly 21 to descend until the pressure plate 8 is contacted with the upper part of the wet paper;
a plurality of upper box bodies 9 and lower box bodies 6 which are arranged in a linear array are respectively arranged in the upper box body assembly 21 and the lower box body assembly 20, the upper box bodies 9 and the lower box bodies 6 are respectively connected with the industrial water chiller 1 and the industrial hot water tank 11, any two adjacent upper box bodies 9 are respectively connected with the industrial water chiller 1 and the industrial hot water tank 11, any two adjacent lower box bodies 6 are also correspondingly respectively connected with the industrial water chiller 1 and the industrial hot water tank 11, the upper box bodies 9 and the corresponding lower box bodies 6 are respectively connected with the industrial water chiller 1 and the industrial hot water tank 11 in the vertical direction, a cold-hot alternating state is formed in the horizontal direction, the cold-hot states are respectively formed in the vertical direction, and the lower box body assembly 20 is tightly attached to the inner bottom surface of the supporting plate 7;
after the upper box body 9 and the lower box body 6 stay at a certain position for a certain time, usually ten minutes, at the moment, the electric push rod 13 is started, so that the upper box body assembly 21 and the lower box body assembly 20 simultaneously slide for a certain distance, namely, the cold and hot alternating treatment is carried out in the horizontal direction, namely, the upper box body 9 at the original position is connected with the industrial water cooler 1, after the action of the electric push rod 13, the upper box body 9 at the position is connected with the industrial hot water tank 11, the whole body is reset after staying for ten minutes, and the steps are repeated; finally, the drying process of the wet paper is realized.
The technical features of the present invention, which are not described in the present application, can be implemented by or using the prior art, and are not described herein again, and of course, the above description is not limited to the above examples, and the present invention is not limited to the above examples, and variations, modifications, additions and substitutions which can be made by those skilled in the art within the spirit of the present invention should also fall within the scope of the present invention.
Claims (10)
1. A drying system of a paper machine is characterized by comprising a paper laying mechanism (17) for laying wet paper, a lower drying system (18) for drying the bottom surface of the paper and an upper drying system (19) for drying the top surface of the paper, wherein the paper laying mechanism (17) is arranged between the lower drying system (18) and the upper drying system (19), the lower drying system (18) and the upper drying system (19) are connected and are connected with an electric push rod (13), so that a refrigerating area and a heating area are alternately arranged above and below a certain position in the wet paper respectively;
the paper laying mechanism (17) is movably arranged on two middle rails (3) which are parallel to each other, a plurality of supporting legs (31) are arranged below the middle rails (3), the lower drying system (18) is movably arranged on two lower rails (2) which are parallel to each other, the upper drying system (19) is movably arranged on two upper rails (4) which are parallel to each other, and a plurality of lifting cylinders (5) are arranged below the upper rails (4);
the paper taking-in mechanism further comprises a paper taking-in mechanism (22) arranged below the electric push rod (13).
2. Drying system of a paper machine according to claim 1, characterized in that the paper laying mechanism (17) comprises a paper machine (32) movably arranged on the two middle rails (3), a support plate (7) arranged between the two middle rails (3), the support plate (7) is U-shaped and is opened downwards, two sides of the support plate (7) are respectively connected with the inner sides of the two middle rails (3), the bottom end of the paper machine (32) is provided with a middle power wheel (33), and the middle power wheel (33) is arranged on the middle rails (3).
3. Drying system of a paper machine according to claim 2, characterized in that the lower drying system (18) comprises a lower box assembly (20), a lower fixing bar (61) arranged below the lower box assembly (20), a lower power wheel (62) arranged below the lower fixing bar (61), the lower power wheel (62) being arranged within the lower track (2), the upper end face of the lower box assembly (20) being in contact with the inner bottom face of the supporting plate (7);
and the lower tank body component (20) is connected with the industrial water chiller (1) and the industrial hot water tank (11).
4. Drying system of a paper machine according to claim 3, characterized in that said lower box assembly (20) comprises several lower boxes (6) arranged in a linear array, a lower pipe (63) passing through said lower boxes (6), of any two adjacent lower boxes (6), one of said lower boxes (6) is connected with the industrial cold water machine (1) through said lower pipe (63), and the other of said lower boxes (6) is connected with the industrial hot water tank (11) through said lower pipe (63).
5. The drying system of a paper machine according to claim 4, characterized in that the upper drying system (19) comprises an upper box assembly (21), an upper fixing rod (10) arranged above the upper box assembly (21), an upper power wheel (92) arranged at the side of the upper box assembly (21), the upper power wheel (92) is arranged in the upper rail (4), the lower end surface of the upper box assembly (21) is in contact with the inner bottom surface of a pressure plate (8), the pressure plate (8) is U-shaped and has an upward opening, and two sides of the pressure plate (8) are respectively connected with the inner sides of the two upper rails (4);
the upper box body assembly (21) is connected with the industrial water chiller (1) and the industrial hot water tank (11).
6. The drying system of a paper machine according to claim 5, characterized in that the upper box assembly comprises a plurality of upper boxes (9) arranged in a linear array, an upper pipe (91) passing through the upper boxes (9), and any two adjacent upper boxes (9), wherein one upper box (9) is connected with the industrial water cooler (1) through the upper pipe (91), and the other upper box (9) is connected with the industrial hot water tank (11) through the upper pipe (91).
7. Drying system of a paper machine according to claim 6, characterized in that the ends of the two upper fixing bars (10) are connected by fixing blocks (12), said fixing blocks (12) are connected with the ends of the two lower fixing bars (61) by fixing uprights (121), said fixing blocks (12) are connected with electric push bars (13), said electric push bars (13) are arranged at the ends of the upper rail (4);
the end parts of the two upper rails (4) are connected through a positioning rod, and the electric push rod (13) is arranged on the positioning rod.
8. The drying system of a paper machine according to claim 1, wherein the paper receiving mechanism (22) comprises a horizontally disposed rotating roller (14), and supporting seats (16) respectively disposed at two ends of the rotating roller (14), wherein a driving shaft is disposed on the supporting seats (16), two ends of the rotating roller (14) are respectively detachably connected with the driving shaft through bolts, and the driving shaft is connected with a motor (15).
9. The drying system of the paper machine as claimed in claim 5, characterized in that the upper end face of the supporting plate (7) is provided with a plurality of first through holes in an array, and the upper end face of the supporting plate (7) is covered with a first water absorbing film;
the lower end face array of the pressure plate (8) is provided with a plurality of second through holes, and the lower end face of the pressure plate (8) is covered with a second water absorption film.
10. The drying method of the paper machine is characterized by comprising the following steps:
step S1: spreading paper with certain humidity;
step S2: an evaporation area with alternate cold and hot is arranged on the upper end surface of the paper;
and step S3: an evaporation area with alternate cold and hot is arranged on the lower end surface of the paper;
and step S4: the two evaporation areas on the upper end surface and the lower end surface of the paper are close to each other, so that the upper end and the lower end of a certain position in the paper are different cold and hot areas;
step S5: moving the upper and lower evaporation areas of the paper in parallel to enable the cold and hot states of the upper and lower ends of the paper at a certain position to be reversely arranged;
step S6: after a certain time, resetting the upper evaporation area and the lower evaporation area of the paper, so that the cold and hot states of the upper end and the lower end of a certain position of the paper in the step S5 are reversely set again;
step S7: the above-mentioned operation is repeated several times, so that the wet paper can be dried with high quality.
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| CN202211230276.XA CN115287933B (en) | 2022-10-08 | 2022-10-08 | Drying system and method of paper machine |
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| CN115094672A (en) * | 2022-06-24 | 2022-09-23 | 杭州博思特装饰材料有限公司 | Manufacturing process of wood grain paper |
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